/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMDispatchFactory.h
Returns true if the factory provides metadata for a given argument.
bool HasArgumentMetaData ( const [FName](API\Runtime\Core\UObject\FName) & InArgumentName, const [FName](API\Runtime\Core\UObject\FName) & InMetaDataKey ) const